If you are subscribed to the Organization plan (not Starter or Growing Business plan), you can set restrictions for certain members on which projects and styleguides they can access.
You can add the users who you want them to access only some specific projects and styleguides, for example, your 3rd party developers or designers, with restricted access. Restricted organization members can only access the projects and styleguides that they have been invited to view.
After adding restricted members to the organization, make sure to invite them to the projects and styleguides that they need to access separately (from your organization workspace, under the Projects or Styleguides tabs).
☝️ Restricted members also count towards your total number of seats.
If you are adding new members from the organization dashboard, you can select “Restricted access” while inviting them.
To update the access level of an existing member of your organization, click on their access dropdown.